# coding:utf-8

comics = []
history = []
code = []

new_comics = ('a', 'b', 'c')
new_history = ('中国历史', '日本历史', '韩国历史')
new_code = ('python', 'django', 'flask')

comics.extend(new_comics)
history.extend(new_history)
code.extend(new_code)

print(comics, history, code)

history.extend(comics)
del comics
print(history)

test = []
test.extend('asdf')
print(test)
